I am trying to store time data for race results in ES, but do NOT need the date or time zone (For example, person X completed a marathon race in 3:04:23). Is there a way to store a time in just HH:MM:SS format?

Some options I found and their drawbacks:

Store as a date, with mapping type of "date" and "format" : "HH:mm:ss". Downside: time zone appears to affect the data when viewing in Kibana. For example, "5:24:50" is interpreted as: "December 31st 1969, 21:24:50.000"

Store as a string. This renders and searches OK, but prevents me from performing any operations (mean, min, max, etc)

Convert to seconds and store as a numeric. Requires converting data in between formats for analysis. This seems the most promising option, just requires some additional work.